Quiz 4 Bio 181 NCSU, Exam Questions and answers, 100% Accurate. VERIFIED.

Quiz 4 Bio 181 NCSU, Exam Questions and answers, 100% Accurate. VERIFIED. which of the following organisms is not a eukaryote? - -bacterium What informational molecule was probably used by the first forms of life (protocells)? - -RNA Which of the following organisms formed the earliest known fossils in earth's history? - -cyanobacteria in stromatolites How do colonies of protists differ from multicellular organisms? - -Colonies have specialized cells for reproduction, but all other cells in the colony are alike. The period during which dinosaurs flourished, but which ended in a mass extinction, was the - -Cretaceous The organism that causes African Sleeping sickness is - -a protist of genus Trypanosoma What is the role of conjugation in ciliated protists? - -It is used during sexual reproduction. What role does phagocytosis play in the life of some protists? - -It allows them to take in large food particles. Bacteria that are heterotrophic - -require organic molecules both as a carbon source and to produce energy Gram negative bacteria - -have a cell wall composed of a thin layer of peptidoglycan covered by a thick outer membrane